n8n/packages/nodes-base/nodes/Spotify/GenericFunctions.ts

import {
	OptionsWithUri,
} from 'request';

import {
	IExecuteFunctions,
	IHookFunctions,
} from 'n8n-core';

import {
	IDataObject,
	NodeApiError,
	NodeOperationError,
} from 'n8n-workflow';

import {
	get,
} from 'lodash';

/**
 * Make an API request to Spotify
 *
 * @param {IHookFunctions} this
 * @param {string} method
 * @param {string} url
 * @param {object} body
 * @returns {Promise<any>}
 */
export async function spotifyApiRequest(this: IHookFunctions | IExecuteFunctions,
	method: string, endpoint: string, body: object, query?: object, uri?: string): Promise<any> { // tslint:disable-line:no-any

	const options: OptionsWithUri = {
		method,
		headers: {
			'User-Agent': 'n8n',
			'Content-Type': 'text/plain',
			'Accept': ' application/json',
		},
		qs: query,
		uri: uri || `https://api.spotify.com/v1${endpoint}`,
		json: true,
	};

	if (Object.keys(body).length > 0) {
		options.body = body;
	}
	try {
		return await this.helpers.requestOAuth2.call(this, 'spotifyOAuth2Api', options);
	} catch (error) {
		throw new NodeApiError(this.getNode(), error);
	}
}

export async function spotifyApiRequestAllItems(this: IHookFunctions | IExecuteFunctions,
	propertyName: string, method: string, endpoint: string, body: object, query?: object): Promise<any> { // tslint:disable-line:no-any

	const returnData: IDataObject[] = [];

	let responseData;

	let uri: string | undefined;

	do {
		responseData = await spotifyApiRequest.call(this, method, endpoint, body, query, uri);
		returnData.push.apply(returnData, get(responseData, propertyName));
		uri = responseData.next || responseData[propertyName.split('.')[0]].next;
		//remove the query as the query parameters are already included in the next, else api throws error.
		query = {};
		if (uri?.includes('offset=1000')) {
			return returnData;
		}
	} while (
		(responseData['next'] !== null && responseData['next'] !== undefined) ||
		(responseData[propertyName.split('.')[0]].next !== null && responseData[propertyName.split('.')[0]].next !== undefined)
	);

	return returnData;
}